Pipeline injection molding core rod first-in and second-out mechanism

Abstract

The utility model relates to the technical field of pipeline injection molding equipment, in particular to a pipeline injection molding core rod first-in rear-out mechanism which is provided with an upper mold frame, an upper mold core is connected to the middle of the lower end face of the upper mold frame, sliding grooves are symmetrically formed in the lower end face of the upper mold frame on the left side and the right side of the upper mold core respectively, and inclined extrusion faces are arranged on the outer sides of the sliding grooves. An extrusion assembly is arranged in the sliding groove and comprises a transverse core rod, a first sliding block, a second sliding block and a sliding insertion rod, the inner side of the first sliding block is fixedly connected with the transverse core rod, the sliding insertion rod is fixedly connected with the outer side of the first sliding block, and a sliding hole is formed in the second sliding block; the outer side of the sliding insertion rod is inserted into a sliding hole of the second sliding block and then makes contact with an extrusion groove formed in the inclined extrusion face of the sliding groove, the lower end face of the upper die frame is connected with an inclined insertion rod, and the lower end of the inclined insertion rod sequentially penetrates through an inclined insertion driving hole of the second sliding block and then is inserted into an inclined insertion avoiding strip hole in the first sliding block. The injection mold has the advantages of simple structure, good injection molding effect, high injection molding efficiency, cost saving, avoidance of excessive flash and the like.

Description

Technical Field

[0001] This utility model relates to the technical field of pipeline injection molding equipment, specifically a pipeline injection mandrel in-line and out-of-line mechanism that features a simple structure, good injection effect, high injection efficiency, cost savings, and avoidance of burr generation. Background Technology

[0002] As is well known, in pipe injection molding, especially in pipe injection molding of tees and above, two transverse mandrels need to be joined together and then the two transverse mandrels are moved in opposite directions to demold. At the same time, each transverse mandrel has a side mandrel that joins with the sides of the two transverse mandrels before injection molding.

[0003] Currently, during the re-molding assembly process, due to the long length of the transverse mandrel and the need for docking, while simultaneously pressing and shifting the mandrel, the shorter lateral mandrel will reach the molded position first. At this point, if the lateral mandrel tilts or extends too far, it will collide with the transverse mandrel, thus affecting the subsequent molding effect. If the lateral mandrel extends too short, it will generate burrs. Moreover, once a collision occurs, the transverse mandrel will tilt or be damaged by the collision, which will also cause burrs. Ultimately, this results in poor injection molding effect, low injection molding efficiency, and the generation of burrs. Furthermore, the generation of burrs requires subsequent repair, increasing costs. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a pipeline injection mandrel in-line and out-of-line mechanism that is simple in structure, has good injection effect, high injection efficiency, saves costs, and avoids burr generation.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A pipeline injection molding mandrel first-in-last-out mechanism is provided, comprising an upper mold frame, with an upper mold core connected to the middle of the lower end face of the upper mold frame. The lower end faces of the upper mold frame on both sides of the upper mold core are symmetrically provided with sliding grooves, and the outer sides of the sliding grooves are respectively provided with inclined extrusion surfaces. The mechanism is characterized by an extrusion assembly within the sliding groove, comprising a transverse mandrel, a first slider, a second slider, and a sliding insert rod. The inner side of the first slider is fixedly connected to the transverse mandrel, and the sliding insert rod is fixedly connected to the outer side of the first slider. The second slider has a sliding hole, and the outer side of the sliding insert rod, after being inserted into the sliding hole of the second slider, contacts the extrusion groove provided on the inclined extrusion surface of the sliding groove. The lower end face of the upper mold frame is connected to the inclined insert rod. The second slider has an inclined insertion drive hole, and the first slider has an inclined insertion clearance strip hole. The lower end of the inclined insert rod passes through the inclined insertion drive hole of the second slider and then inserts into the inclined insertion clearance strip hole of the first slider.

[0007] The extrusion groove of this utility model includes a vertical extrusion section and an oblique transition section. The oblique transition section enables the sliding insert rod to transition into or out, while the vertical extrusion section enables the sliding insert rod to be extruded.

[0008] The first slider of this utility model is L-shaped. The inner side of the vertical part of the L-shaped first slider is fixedly connected to the horizontal core rod. The outer side of the vertical part of the L-shaped first slider is in contact with the second slider. The oblique insertion clearance strip hole is provided on the horizontal part of the L-shaped first slider.

[0009] The second slider of this utility model has a reset groove on its inner side, and a reset spring is provided in the reset groove. The outer end of the reset spring is inserted into the reset groove, and the inner end of the reset spring is in contact with the rear side of the first slider.

[0010] The outer surface of the second slider of this utility model is set as an inclined sliding surface that cooperates with the inclined extrusion surface of the sliding groove. An inclined guide post is provided on the inclined sliding surface. One end of the inclined guide post is connected to the inclined sliding surface, and the other end of the inclined guide post is inserted into the inclined guide hole provided on the inclined extrusion surface.

[0011] The lower end face of the upper mold core described in this utility model is provided with an upper forming groove, the lower mold core is connected to the lower template below the upper mold core, the upper end face of the lower mold core is provided with an upper forming groove, and the upper mold frame is connected to the upper template.

[0012] This utility model, due to the above-mentioned structure, has the advantages of simple structure, good injection molding effect, high injection molding efficiency, cost saving, and avoidance of flash generation. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 yes Figure 1 A schematic diagram of the structure without an upper mold frame and upper mold core.

[0015] Figure 3 yes Figure 1 A bottom view of the upper and middle mold frame.

[0016] Figure 4 yes Figure 1 A sectional view.

[0017] Figure 5 yes Figure 1 A sectional view of the connection points between the middle sliding insert rod and the upper mold frame, the first slider, and the second slider.

[0018] Figure 6 This is a schematic diagram of the first slider.

[0019] Figure 7 This is a schematic diagram of the second slider. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings:

[0021] As shown in the attached figure, a pipeline injection molding mandrel first-in-last-out mechanism includes an upper mold frame 1, with an upper mold core 2 connected to the middle of the lower end face of the upper mold frame 1. Sliding grooves 3 are symmetrically provided on the lower end faces of the upper mold frame 1 on both the left and right sides of the upper mold core 2. Inclined extrusion surfaces 4 are provided on the outer sides of the sliding grooves 3. The mechanism is characterized by an extrusion assembly within the sliding grooves 3, comprising a transverse mandrel 5, a first slider 6, a second slider 7, and a sliding insert rod 8. The inner side of the first slider 6 is fixedly connected to the transverse mandrel 5, and the sliding insert rod 8... The first slider 6 is fixedly connected to the outside of the second slider 7, which is provided with a sliding hole 9. The outside of the sliding rod 8 is inserted into the sliding hole 9 of the second slider 7 and then contacts the extrusion groove 10 provided on the inclined extrusion surface 4 of the sliding groove 3. The lower end face of the upper mold frame 1 is connected to the inclined rod 11. The second slider 7 is provided with an inclined insertion drive hole 12, and the first slider 6 is provided with an inclined insertion clearance strip hole 13. The lower end of the inclined rod 11 passes through the inclined insertion drive hole 12 of the second slider 7 and then inserts into the inclined insertion clearance strip hole 13 on the first slider 6.

[0022] Furthermore, the extrusion groove 10 includes a vertical extrusion section 14 and an oblique transition section 15. The oblique transition section 15 enables the sliding insertion rod 8 to transition into or out, while the vertical extrusion section 14 enables the extrusion of the sliding insertion rod 8.

[0023] Furthermore, the first slider 6 is L-shaped, the inner side of the vertical part of the L-shaped first slider 6 is fixedly connected to the horizontal core rod 5, the outer side of the vertical part of the L-shaped first slider 6 is in contact with the second slider 7, and the oblique insertion clearance strip hole 13 is provided on the horizontal part of the L-shaped first slider 6.

[0024] Furthermore, the inner side of the second slider 7 is provided with a reset groove 16, and a reset spring is provided in the reset groove 16. The outer end of the reset spring is inserted into the reset groove 16, and the inner end of the reset spring is in contact with the rear side of the first slider 6.

[0025] Furthermore, the outer surface of the second slider 7 is configured as an inclined sliding surface 17 that cooperates with the inclined extrusion surface 4 of the sliding groove 3. An inclined guide post 18 is provided on the inclined sliding surface 17. One end of the inclined guide post 18 is connected to the inclined sliding surface 17, and the other end of the inclined guide post 18 is inserted into the inclined guide hole 19 provided on the inclined extrusion surface 4.

[0026] Furthermore, the lower end face of the upper mold core 2 is provided with an upper forming groove, the lower mold core is connected to the lower template below the upper mold core 2, the upper end face of the lower mold core is provided with an upper forming groove, and the upper mold frame 1 is connected to the upper template.

[0027] When the above structure is installed and used, the upper mold core 2 is installed on the upper mold frame 1, the upper mold frame 1 is connected to the upper template, and the lower mold core is installed on the lower template. The lower end face of the upper mold frame on both the front and rear sides of the upper mold core 2 is symmetrically provided with lateral grooves 20. Lateral sliders 21 are provided in the lateral grooves 20. The upper end of the lateral insertion rod 22 is connected to the upper mold frame 1. The lower end of the inclined insertion rod 11 extends into the lateral drive hole on the lateral slider 21 and then extends out. The inner side of the lateral slider 21 is connected to the lateral core rod 23. The upper ends of the lateral insertion rod 22 and the inclined insertion rod 11 are respectively fixedly connected to the upper mold frame 1 via fixing blocks 24. Anti-wear plates 25 are provided below the lateral slider 21 and below the first slider 6. The anti-wear plate 25 is provided with strip holes 26 for the lateral insertion rod 22 and the inclined insertion rod 11 to move. The anti-wear plate 25 is fixed on the lower template. The structure of the lower template and the lower mold core is the same as that of the prior art, and will not be described in detail here.

[0028] During the demolding process, the upper mold plate moves the upper mold frame 1 upward. At the same time, the upper mold frame 1 moves upward, which in turn moves the lateral insert rod 22 and the inclined insert rod 11 upward. The lateral insert rod 22 moves the lateral slider 21 outward, and the inclined insert rod 11 moves the second slider 7 outward. At this time, the lateral slider 21 moves the lateral core rod 23 outward during demolding. Since there is an inclined insertion clearance strip hole 13 between the inclined insert rod 11 and the first slider 6, the second slider 7 moves while the inclined insert rod 11 moves upward, and the first slider 6 remains stationary. When the inclined insert rod 11 moves to the outer end of the inclined insertion clearance strip hole 13, the first slider 6 begins to move outward with the action of the inclined insert rod 11. At this time, the first slider 6 and the second slider 7 move outward at the same time. Therefore, the lateral core rod 5 moves backward relative to the lateral core rod 23 during the demolding process. The lateral core rod 23 moves out first, and the lateral core rod 5 moves out later.

[0029] During the mold closing process, the upper mold plate moves the upper mold frame 1 downwards. The oblique transition groove in the extrusion groove 10 on the upper mold frame 1 guides the tail of the sliding insert rod 8 into the vertical extrusion section 14 of the extrusion groove 10. The upper mold frame 1 continues to move downwards. At this time, the sliding insert rod 8 extrudes the first slider 6, pushing the first slider 6 to move. Therefore, the first slider 6 drives the transverse core rod 5 to enter the mold closing section first. The upper mold frame 1 continues to move downwards. When the oblique insert rod 11 contacts the front end of the oblique insertion clearance strip hole 13 of the first slider 6, the oblique insert rod 11... The first slider 6 and the second slider 7 move simultaneously toward the inner mold closing direction. At this time, the side insert rod 22 drives the side slider 21 and the side mandrel 23 to return to their positions together. This ensures that when the transverse mandrel 5 passes over the end of the side mandrel 23 first, the side mandrel 23 can close on the side of the transverse mandrel 5 during mold closing. This avoids the transverse mandrel 5 colliding with the end of the side mandrel 23 after the side mandrel 23 has reached its position first. This protects the side mandrel 23 and the transverse mandrel 5 and also ensures the injection molding effect.

[0030] The above scheme achieves the function of the transverse core rod 5 advancing inward during mold closing and exiting backward during demolding. Due to the above structure, this utility model has the advantages of simple structure, good injection molding effect, high injection molding efficiency, cost saving, and avoidance of flash generation.

Claims

1. A pipeline injection core rod advanced and retreated mechanism, which is provided with an upper mold frame, a middle part of a lower end surface of the upper mold frame is connected with an upper mold core, a lower end surface of the upper mold core on the left and right sides of the upper mold frame is respectively provided with a sliding groove, and the outer side of the sliding groove is respectively provided as an inclined extrusion surface, characterized in that The sliding slot is internally provided with an extrusion assembly, which comprises a transverse core rod, a first sliding block, a second sliding block and a sliding insertion rod.

2. The advanced ejection mechanism for a pipe injection core rod according to claim 1, characterized in that The extrusion slot comprises a vertical extrusion part and an inclined transition part.

3. The advanced ejection mechanism for a plastic injection pipe core rod according to claim 1, characterized in that The first sliding block is in an L shape, the inner side of the vertical part of the L-shaped first sliding block is fixedly connected with the transverse core rod, the outer side of the vertical part of the L-shaped first sliding block is in contact with the second sliding block, and the inclined insertion avoiding strip hole is arranged on the horizontal part of the L-shaped first sliding block.

4. The advanced ejection mechanism for a plastic injection pipe core rod according to claim 1, characterized in that The inner side of the second sliding block is provided with a reset slot, the reset slot is internally provided with a reset spring, the outer end of the reset spring is inserted into the reset slot, and the inner end of the reset spring is in contact with the rear side of the first sliding block.

5. The advanced ejection mechanism for a plastic injection pipe core rod according to claim 1, characterized in that The outer side of the second sliding block is provided with an inclined sliding surface matched with the inclined extrusion surface of the sliding slot, the inclined sliding surface is provided with an inclined guide column, one end of the inclined guide column is connected with the inclined sliding surface, and the other end of the inclined guide column is inserted into an inclined guide hole arranged on the inclined extrusion surface.

6. An advanced ejection mechanism for a plastic injection core rod according to claim 1, wherein The lower end surface of the upper mold core is provided with an upper forming slot, a lower mold core is connected below the upper mold core, the upper end surface of the lower mold core is provided with an upper forming slot, and the upper mold frame is connected with the upper mold plate.

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